Thanks John. We are not relying on the jockey pump to fight a fire. Whether or not the jockey pump operates or not, the fire pump would operate on pressure drop and do the job that it is designed to do (which generally is to supply more than one sprinkler). The system does not need a fire pump to supply water for one sprinkler operating and therefore there is no reason to run the fire pump to test the switch which actually simulates one sprinkler operating. All the tests required by NFPA 25 for the fire pump are performed independent of the switch testing. The situation we have doesn't lessen the time that the fire pump runs since we would otherwise shut down the pump to do the switch testing and prevent false alarms, but we do free up our personnel to do other things instead of carrying out impairment procedures.
I appreciate your thoughts, but I don't see anything that we are doing that is detrimental to the systems operations and I don't see us increasing any negative to the operations. Thanks again. Pete -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of John Denhardt via Sprinklerforum Sent: Monday, November 22, 2021 2:05 PM To: [email protected] Cc: John Denhardt <[email protected]> Subject: [EXTERNAL] Re: Fire Pump Shutdown With due respect Pete, I do not agree with your approach. Let me explain my thoughts. (All references are to the 2019 edition of NFPA 20 unless noted otherwise.) By definition, a pressure maintenance pump is designed to maintain the pressure on the fire protection system when the system is not flowing water. 3.3.49.15 Pressure Maintenance (Jockey or Make-Up) Pump. A pump designed to maintain the pressure on the fire protection system(s) between preset limits when the system is not flowing water. Pressure maintenance pumps do not have to be listed, only approved. 4.27.2 Pressure maintenance pumps shall not be required to be listed. Pressure maintenance pumps shall be approved. The pressure maintenance pump shall be sized to account for normal system leakage. 4.27.2.1* The pressure maintenance pump shall be sized to replenish the fire protection system pressure due to allowable leakage and normal drops in pressure. 4.27.3 Pressure maintenance pumps shall have rated capacities not less than any normal leakage rate. 4.27.4 Pressure maintenance pumps shall have discharge pressure sufficient to maintain the desired fire protection system pressure. A pressure maintenance pump's control and check valves are not required to be listed. 4.27.6.2 Valves and components for the pressure maintenance pump shall not be required to be listed. A pressure maintenance pump's control valves are not required to be supervised. 4.27.6.7 The isolation valves serving the pressure maintenance pump shall not be required to be supervised. A pressure maintenance pump's controller does not have to be lisetd for fire protection service. 4.27.8 The controller for a pressure maintenance pump shall be listed but shall not be required to be listed for fire pump service. A pressure maintenance pump''s electrical supply does not need to have a secondary power supply. 4.27.9 The pressure maintenance pump shall not be required to have alternate or standby power. Given the above, I believe a fire pump system should operate any time a sprinkler is flowing water. This includes testing in accordance with NFPA 25. Fire pump systems need to be exercised. Operating a properly maintained fire pump system during testing operations does not impact the life expectancy of a fire pump system. In fact, it may increase. I prefer to see all the systems operate the way they would when no one is around. In my opinion, pressure maintenance pumps are not intended and should not be sized to supply an operating sprinkler. The applicable annex language from A.4.27.1 supports my thoughts. For situations where the pressure maintenance pump serves only aboveground piping for fire sprinkler and standpipe systems, the pressure maintenance pump should be sized to provide a flow less than a single fire sprinkler. The main fire pump should start and run (providing a pump running signal) for any waterflow situation where a sprinkler has opened, which will not happen if the pressure maintenance pump is too large. In addition, NFPA 25 - 2020 edition states fire pump systems shall remain in service unless they are constantly attended by qualified personnel, or all impairment procedures are followed. I understand your desire not to cause multiple fire pump system run signals being sent to your monitoring system, however, the water flow switches are already called out so it should not be a burden to call out the fire pump run signals. Again, I prefer to leave the fire pump system in full service during all testing operations. 13.2.4.7 Fire pumps shall not be taken out of service during testing unless constantly attended by qualified personnel, or all impairment procedures contained in Chapter 15 are followed. *The above is my opinion and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects. This is provided with the understanding that the AFSA assumes no liability for this opinion or actions taken on it and they are not to be considered the official position of the **AFSA, and/or NFPA or its technical committees.**AFSA cannot provide design or consulting engineering services, and this opinion should therefore not be considered, nor relied upon, as such.* Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.facebook.com%2Ffiresprinkler.org%2F&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479116233%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=KTiAueqVxthWHSsGlL5A5y9sZhW2PPIXbSRle14A51k%3D&reserved=0> <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwitter.com%2Fafsa%2Fstatus%2F1039528345367732224&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479126191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=pTPi71VqjH7Vg90%2B%2FvXXje6Mw3H8G4vtW2PhQKmmXIA%3D&reserved=0> <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Famerican-fire-sprinkler-association-afsa-%2F&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479126191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=bxMX4V%2FJJqJ6P373AqiSgjAabZlRCR%2BCKAKCFEgv8xw%3D&reserved=0> <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.instagram.com%2Ffiresprinklerorg%2F&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479126191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=4rvOC0afRYvVLGMx6AkoRREs7wc8rQY4UF6dU5%2FX1go%3D&reserved=0> *Our members are at the heart of everything we do.* *Are you a member with a technical question? * Don't forget one of the most valuable resources that American Fire Sprinkler Association provides is technical reviews from our Engineering & Technical Services Department. It's like having an FPE on your staff. Visit https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.firesprinkler.org%2Finterp&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479126191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=N4pduDsr49dz4dfX0SrUHZXMWD%2BsKBiRTyd47zqPOy0%3D&reserved=0 <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.firesprinkler.org%2FWWW%2FContacts%2FSign_In.aspx%3FWebsiteKey%3D3dff22a3-0306-479c-bccc-7aa1986c8ada%26LoginRedirect%3Dtrue%26returnurl%3D%2FWWW%2FTechnical_Services%2FInformal_Interpretations%2FWWW%2FInformal_Interpret%2FMember_View.aspx%3Fhkey%3D8023e65f-a2ad-4465-9920-0f9313a07324&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479126191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=iCY8iK6A2Thnth%2F6aAOpx33jjUHjXWpHBOZh6ROsl5A%3D&reserved=0> to submit a question today! On Mon, Nov 22, 2021 at 7:44 AM Larrimer, Peter A (HEFP\19HEF) via Sprinklerforum <[email protected]> wrote: > For what it is worth, we went in a different direction. We upsized > the jockey pump to 50gpm to handle the flow of one sprinkler (5.6 X > square root of 100) so that testing of the sprinkler switches can be > done without the booster pump operating (we often have lots of > switches supplied by the pump). This allows a lot of switches to be > tested without having to shut down the pump, which would require > instituting impairment procedures. We also generally use manual shut > down for the booster pump upon activation of the pump running alarm > and staff who would respond to the pump don't have to be involved during > switch testing with this arrangement. > > Pete Larrimer > VA > > -----Original Message----- > From: Sprinklerforum <[email protected]> > On Behalf Of BF Blake via Sprinklerforum > Sent: Thursday, November 18, 2021 3:27 PM > To: [email protected] > Cc: BF Blake <[email protected]> > Subject: [EXTERNAL] Re: Fire Pump Shutdown > > Copy. Was installed/designed to 2013 Edition. Central station > reporting is not operational. Thanks for all. > > Byron > > ________________________________ > From: Sprinklerforum <[email protected]> > on behalf of John Denhardt via Sprinklerforum < > [email protected]> > Sent: Thursday, November 18, 2021 11:23 PM > To: [email protected] < > [email protected]> > Cc: John Denhardt <[email protected]> > Subject: Re: Fire Pump Shutdown > > Keep in mind the following from UFC 3-600-01 (8 AUGUST 2016, CHANGE 5, > 14 SEPTEMBER 2020) > > 9.5.3 Pump Start and Shutdown. > > > 9.5.3.1 Fire pumps must be arranged to start automatically. > > > 9.5.3.2 Fire pumps must be arranged to automatically shut down after > reaching the > > stop pressure and the expiration of \3\the minimum run time determined > by NFPA 20/3/. > > Stop pressure must be at least 5 psi below maximum churn pressure at > the lowest > > available static pressure. > > Note: The lowest available static pressure should be utilized in > determining churn > > pressure so that the stop pressure can be achieved with low pressure. > The > 5 psi > > differential is used to allow for gauge error.\2\ > > > 9.5.3 /2/Fire pump activation (run) must transmit an alarm condition > to the > > Installation receiving station, or remote receiving station, but not > activate the Facility > > notification appliance > > > While I understand what the above states, my personal opinion is to > have the fire pump operating anytime a sprinkler is operating. We do > not want to short cycle the fire pump. My suggestion is always for > manual shut-down unless the site is unmanned and response to the site > would take considerable time.. A properly designed and maintained > fire pump system can operate at churn or near churn conditions for a > lengthy time with no issues. > > We all know fire pump systems are maintained in full accordance with > NFPA > 25 and the manufacturer's recommendations. > > *The above is my opinion and has not been processed as a formal > interpretation in accordance with the NFPA Regulations Governing > Committee Projects. This is provided with the understanding that the > AFSA assumes no liability for this opinion or actions taken on it and > they are not to be considered the official position of the **AFSA, > and/or NFPA or its technical committees.**AFSA cannot provide design > or consulting engineering services, and this opinion should therefore > not be considered, nor relied upon, as such.* > > Thanks, > John > > John August Denhardt, PE > *Vice President, Engineering and Technical Services* > > *American Fire Sprinkler Association* > m: p: 301-343-1457 > 214-349-5965 ext 121 > w: firesprinkler.org > < > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > facebook.com%2Ffiresprinkler.org%2F&data=04%7C01%7C%7Cf80efaf03f4b > 48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C6377 > 32047479126191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2l > uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=hOe6U13gLrsKOcBcN > tGX29gJpPcXTU2qqO%2FKJFa2zOk%3D&reserved=0 > > > < > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwit > ter.com%2Fafsa%2Fstatus%2F1039528345367732224&data=04%7C01%7C%7Cf8 > 0efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0% > 7C0%7C637732047479126191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL > CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=pTPi71V > qjH7Vg90%2B%2FvXXje6Mw3H8G4vtW2PhQKmmXIA%3D&reserved=0 > > > < > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > linkedin.com%2Fcompany%2Famerican-fire-sprinkler-association-afsa-%2F& > amp;data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf4 > 5ee821db7ab251ab3bf%7C0%7C0%7C637732047479126191%7CUnknown%7CTWFpbGZsb > 3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D% > 7C3000&sdata=bxMX4V%2FJJqJ6P373AqiSgjAabZlRCR%2BCKAKCFEgv8xw%3D&am > p;reserved=0 > > > < > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > instagram.com%2Ffiresprinklerorg%2F&data=04%7C01%7C%7Cf80efaf03f4b > 48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C6377 > 32047479126191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2l > uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=4rvOC0afRYvVLGMx6 > AkoRREs7wc8rQY4UF6dU5%2FX1go%3D&reserved=0 > > > > *Our members are at the heart of everything we do.* > > > *Are you a member with a technical question? * > > Don't forget one of the most valuable resources that American Fire > Sprinkler Association provides is technical reviews from our > Engineering & Technical Services Department. It's like having an FPE > on your staff. Visit > > https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.f > iresprinkler.org%2Finterp&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08 > d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C63773204747912 > 6191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT > iI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=N4pduDsr49dz4dfX0SrUHZXMWD% > 2BsKBiRTyd47zqPOy0%3D&reserved=0 > < > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > firesprinkler.org%2FWWW%2FContacts%2FSign_In.aspx%3FWebsiteKey%3D3dff2 > 2a3-0306-479c-bccc-7aa1986c8ada%26LoginRedirect%3Dtrue%26returnurl%3D% > 2FWWW%2FTechnical_Services%2FInformal_Interpretations%2FWWW%2FInformal > _Interpret%2FMember_View.aspx%3Fhkey%3D8023e65f-a2ad-4465-9920-0f9313a > 07324&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b2 > 3abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479126191%7CUnknown%7CTWF > pbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6M > n0%3D%7C3000&sdata=iCY8iK6A2Thnth%2F6aAOpx33jjUHjXWpHBOZh6ROsl5A%3 > D&reserved=0 > > > to > submit a question today! > > > > On Thu, Nov 18, 2021 at 3:13 PM BF Blake via Sprinklerforum < > [email protected]> wrote: > > > Thanks John, 100% with you. > > Byron, Poland. > > > > > > ________________________________ > > From: Sprinklerforum > > <[email protected]> > > on behalf of John Denhardt via Sprinklerforum < > > [email protected]> > > Sent: Thursday, November 18, 2021 11:11 PM > > To: [email protected] < > > [email protected]> > > Cc: John Denhardt <[email protected]> > > Subject: Re: Fire Pump Shutdown > > > > To me, the intent is to have the fire pump operating anytime a > > sprinkler is operating. We do not want to short cycle the fire pump. > > My suggestion is always for manual shut-down unless the site is > > unmanned and response to Technical he site would take considerable > > time.. A properly designed and maintained fire pump system can > > operate at churn or near churn conditions for a lengthy time with no > issues. > > > > *The above is my opinion and has not been processed as a formal > > interpretation in accordance with the NFPA Regulations Governing > > Committee Projects. This is provided with the understanding that the > > AFSA assumes no liability for this opinion or actions taken on it > > and they are not to be considered the official position of the > > **AFSA, and/or NFPA or its technical committees.**AFSA cannot > > provide design or consulting engineering services, and this opinion > > should therefore not be considered, nor relied upon, as such.* > > > > Thanks, > > John > > > > John August Denhardt, PE > > *Vice President, Engineering and Technical Services* > > > > *American Fire Sprinkler Association* > > m: p: 301-343-1457 > > 214-349-5965 ext 121 > > w: firesprinkler.org > > < > > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > > facebook.com%2Ffiresprinkler.org%2F&data=04%7C01%7C%7Ce77f82920c > > 1b > > 4121c81a08d9aad1d7b5%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C63 > > 77 > > 28640517024173%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV > > 2l > > uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=4hbQHFn9YeX0dIc > > %2 > > BpnuDhI%2FF8VZ%2BuOKy4lS%2BEps5YeU%3D&reserved=0 > > > > > < > > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftw > > it > > ter.com%2Fafsa%2Fstatus%2F1039528345367732224&data=04%7C01%7C%7C > > e7 > > 7f82920c1b4121c81a08d9aad1d7b5%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C > > 0% > > 7C0%7C637728640517024173%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA > > iL > > CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=YSJgg > > Np > > %2FvC7udgb4OBJXGYNCwxHSgIdla%2B0jn3V%2F%2FH4%3D&reserved=0 > > > > > < > > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > > linkedin.com%2Fcompany%2Famerican-fire-sprinkler-association-afsa-%2 > > F& > > amp;data=04%7C01%7C%7Ce77f82920c1b4121c81a08d9aad1d7b5%7Ce95f1b23aba > > f4 > > 5ee821db7ab251ab3bf%7C0%7C0%7C637728640517024173%7CUnknown%7CTWFpbGZ > > sb > > 3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3 > > D% > > 7C3000&sdata=EWdjjWzFysZjrSl0gu3yQPdXUn9MwyCIrQu4U7IFEoY%3D& > > re > > served=0 > > > > > < > > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > > instagram.com%2Ffiresprinklerorg%2F&data=04%7C01%7C%7Ce77f82920c > > 1b > > 4121c81a08d9aad1d7b5%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C63 > > 77 > > 28640517024173%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV > > 2l > > uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=oVAv1fuHAtsv8VX > > nb > > SwHc%2B2j2I%2BX0ZlrjxTLOJt56W8%3D&reserved=0 > > > > > > > *Our members are at the heart of everything we do.* > > > > > > *Are you a member with a technical question? * > > > > Don't forget one of the most valuable resources that American Fire > > Sprinkler Association provides is technical reviews from our > > Engineering & Technical Services Department. It's like having an FPE > > on your staff. Visit > > > > https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww > > .f%2F&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1 > > b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479126191%7CUnknown%7 > > CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJ > > XVCI6Mn0%3D%7C3000&sdata=W5HmXWgaYC7gBw11uX2DWRf5K%2FQnJy%2F5ad0 > > Lhjq0pJc%3D&reserved=0 > > iresprinkler.org%2Finterp&data=04%7C01%7C%7Ce77f82920c1b4121c81a > > 08 > > d9aad1d7b5%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637728640517 > > 02 > > 4173%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJ > > BT > > iI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=CZLoiuIGHeyOmtS6LZwg7T4EB > > T1 > > OL39bqq8vmmqS3LM%3D&reserved=0 > > < > > https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > > firesprinkler.org%2FWWW%2FContacts%2FSign_In.aspx%3FWebsiteKey%3D3df > > f2 > > 2a3-0306-479c-bccc-7aa1986c8ada%26LoginRedirect%3Dtrue%26returnurl%3 > > D% > > 2FWWW%2FTechnical_Services%2FInformal_Interpretations%2FWWW%2FInform > > al > > _Interpret%2FMember_View.aspx%3Fhkey%3D8023e65f-a2ad-4465-9920-0f931 > > 3a > > 07324&data=04%7C01%7C%7Ce77f82920c1b4121c81a08d9aad1d7b5%7Ce95f1 > > b2 > > 3abaf45ee821db7ab251ab3bf%7C0%7C0%7C637728640517024173%7CUnknown%7CT > > WF > > pbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI > > 6M > > n0%3D%7C3000&sdata=6sIc%2FvF3CNOcknTm47sVubYFAKT0WH2hUynTv8%2FF2 > > AY > > %3D&reserved=0 > > > > > to > > submit a question today! > > > > > > On Thu, Nov 18, 2021 at 2:27 PM BF Blake via Sprinklerforum < > > [email protected]> wrote: > > > > > Greetings Forum Members > > > > > > Do we believe it is the intent of NFPA 20 TC is for 10 minute > > > automatic shut down (when enabled) of fire pumps to apply only > > > during > churn (e.g. > > > dead head, closed loop, testing) conditions or to any condition to > > include > > > sprinkler flow (e.g. 1/2" 5.6K ITC flow)? > > > > > > Is the intent to protect the fire pump from "burn out"? Is the > > > intent to run pumps to failure (destruction) or is the intent, > > > with > > > 10 minute auto shut down, where permitted, to attempt to preserve > > > the > pump? > > > > > > Thanks > > > > > > Byron > > > NATO Facility > > > UFC Criteria 03-600-01 (2013) Applicable Słupsk, Pomorskie, Poland > > > > > > _______________________________________________ > > > Sprinklerforum mailing list > > > [email protected] > > > > > > > > https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flis > > ts > > .firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org > > &a > > mp;data=04%7C01%7C%7Ce77f82920c1b4121c81a08d9aad1d7b5%7Ce95f1b23abaf > > 45 > > ee821db7ab251ab3bf%7C0%7C0%7C637728640517034132%7CUnknown%7CTWFpbGZs > > b3 > > d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D > > %7 > > C3000&sdata=Y1iTfH2ifJnALm%2FwsFqNs%2BujWt6N4H2p2he4xP74xaA%3D&a > > mp > > ;reserved=0 > > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flis > > ts > > .firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org > > &a > > mp;data=04%7C01%7C%7Ce77f82920c1b4121c81a08d9aad1d7b5%7Ce95f1b23abaf > > 45 > > ee821db7ab251ab3bf%7C0%7C0%7C637728640517034132%7CUnknown%7CTWFpbGZs > > b3 > > d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D > > %7 > > C3000&sdata=Y1iTfH2ifJnALm%2FwsFqNs%2BujWt6N4H2p2he4xP74xaA%3D&a > > mp > > ;reserved=0 _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flis > > ts > > .firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org > > &a > > mp;data=04%7C01%7C%7Ce77f82920c1b4121c81a08d9aad1d7b5%7Ce95f1b23abaf > > 45 > > ee821db7ab251ab3bf%7C0%7C0%7C637728640517034132%7CUnknown%7CTWFpbGZs > > b3 > > d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D > > %7 > > C3000&sdata=Y1iTfH2ifJnALm%2FwsFqNs%2BujWt6N4H2p2he4xP74xaA%3D&a > > mp > > ;reserved=0 > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists > .firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org&a > mp;data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45 > ee821db7ab251ab3bf%7C0%7C0%7C637732047479136145%7CUnknown%7CTWFpbGZsb3 > d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7 > C3000&sdata=sKN1x%2FtoFUmNKKkUrSWDdp1ByE8pN6v9RLvBT1q23f0%3D&r > eserved=0 _______________________________________________ > Sprinklerforum mailing list > [email protected] > > https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists > .firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org&a > mp;data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45 > ee821db7ab251ab3bf%7C0%7C0%7C637732047479136145%7CUnknown%7CTWFpbGZsb3 > d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7 > C3000&sdata=sKN1x%2FtoFUmNKKkUrSWDdp1ByE8pN6v9RLvBT1q23f0%3D&r > eserved=0 _______________________________________________ > Sprinklerforum mailing list > [email protected] > > https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists > .firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org&a > mp;data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45 > ee821db7ab251ab3bf%7C0%7C0%7C637732047479136145%7CUnknown%7CTWFpbGZsb3 > d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7 > C3000&sdata=sKN1x%2FtoFUmNKKkUrSWDdp1ByE8pN6v9RLvBT1q23f0%3D&r > eserved=0 > _______________________________________________ Sprinklerforum mailing list [email protected] https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org&data=04%7C01%7C%7Cf80efaf03f4b48bd54ba08d9adeb168a%7Ce95f1b23abaf45ee821db7ab251ab3bf%7C0%7C0%7C637732047479136145%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=sKN1x%2FtoFUmNKKkUrSWDdp1ByE8pN6v9RLvBT1q23f0%3D&reserved=0 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
